Loom.



v J. E. yYAR'BROUGHl LOOM.

APPLICATION FILED AUG. 10, 1912. 1,047,364, Patented Deo. 17, 1912.

v 4 SHEETS-SHEET 1.

J. E. YARBR-OUGH.

LOOM.

APPLICATION rILBD AUG. 1o, 1912.

Patented Dec. 17, 1.912.

4 SHEETS-SHEET 2.

`J E. YARBROUGH- LOOM.

APPLICATION FILED Alm 1o, 1912.

Patented Dem?, 1912..

UNIE sears rarnr rica.,

JOHN E.' YARBROUGH, 0F ATLANTA, GEORGIA, ASSIGNOR.OF,ONE,-IIALF T0 C. ,5. v

MCMAHAN, OF ATLANTA, GEORGIA.

LOOM.

Specification ofietters Patent.

Patented Dec.- il 7,1912.

Application filed August 10, 1912. Serial` No. 714,431.`

To all -wzom it, may concern: p

--Beit known that I, JOHN E. YARBROUGH, citizen of the United States, residing at'Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful Improvements inv Looms; and do hereby declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art'to which itappertains to make. and use the Vsaine,.reference being had to the accompanyf ing drawings, and to letters or figures of reference marked thereon, which 'form a part of this specification.

This invention. relates to improvements inA looms, and more particularly theineans employed for throwing the shuttle.

` In inyallowed application for patent, Sel rial No. 642,627, filed August 7, 1911, I have shown, described, and claimed broadly means for forming a partial vacuum for throwing a shuttle, the present invention being directed more especially to practical improvements in the mechanism set forth, and in the principles involved therein.

f rlhe object of the present inventionv is ltoV provide effective means, operated by the loom, to form a partial vacuum whereby the' subsequent restoration of atmospheric pressure will quickly and with little friction, throw a shuttleacross the lay. f i

l further ,object of the invention isv to provide vacuum forming means which when operating requires but little movement of the parts to create suilcient sub-atmospheric i pressure that the subsequent restoration of atmospheric pressure will -impart to the shuttle-a quick blow to drive it across the loom.

A still further object of th'e invention is to provide means for forming a partial vacuum, and before saine is completed utilize the destruction thereof to throw the shuttle.

The invention also aims to provide shuttle throwing mechanism 'which will insure of the shuttle being carried entirely across the lay, should the device be ytripped when sto-pping the mechanism, vthereby preventing the shuttle stopping part way of its travel and interfering with the thread. A

A still further object of the invention is to provide means for insuring of the lay assuming its normal position when the mechanisin is stopped, to allow the operator to immediately adjust or repair the threads, or

'Vtoregulate thehar'ness, etc., consequently eliminating the necessity of manually turning the mechanism to cause the lay to as- ,sume a position to permit the operator to manipulate the threads.

Theinvention' also relates to improvements in the means employed for tripping and operating the vacuum forming means.

The iiivent-ion compreheiids improvements in the'details of construction and arrangement of parts which will be hereinafter described, and particularly pointed out in the claims. v

In the drawings: Figure l is a perspective view showing the application of my present improvement. Fig. 2'is an end'elevation of the saine, illust-rating the parts in full lines when the lay is in normal position, and in dotted lines when the lay has been moved to tl limit of its forward stroke. Fig. 3 is a d; iil vertical section of the pitker operating mechanism, the cylinder and piston be ing iii elevated position preparatory to creating a vacuum. Fig. l is a detail side elevation of the same, but the cylinder having been moved downwardly to form a partial vacuuin. Fig'. 5 is a similar view, but. illustrat-ing the. piston releasing mechanism as 'having been tripped to thro-w the shuttle across the lay. Fig. 6 is a front elevation illustrating the applica-tion. of my inventionv 'in a somewhat different form. Fig. 7 is a detail cross section of the modied construction of connect-ion between the picker shoe and the standards of the cylinder. Fig. 8 is a detail view of a cushion regulating valve.l

In the drawings, 1 indicates the frame o`f an ordinarylooin, 2 the crank shaft, 3 the rocker shaft, and 4 the counter shaft. Mount- -ed on the rocker shaft 3, are the swords 5,

cariving at their up )er ends the usual lay 6. At the ends of the llay are the shuttle boxes 7,*to receive a shuttleMS. The crank shaft is connected to the lay by pitnien 9 in the manner new practised in machines of this type. .y Y

The description thus far relates to a loom of ordinary construction, and requires no further description,- it being essential, however, to a 'thorough undei'standing of. mV

present impro vement.

Mounted on the rocker shaft 3, and atixed bearing l0, inalinemeiit therewith, is a laterally swinging frame l1, comprising two parallel spaced side bars 11@ and 11",'aiid a lhorizontal bar indicated at 12. The horizontal bar 12, is secured at 13, to one of the swords' 5, and on its free outer upper surface it is formed wit-h a guideway-13a, and on its edges are vertical guides-14. Supported vbetween the vertical bars llfand 11b of the. vswinging open frame 11, is a cylinder 15,

- and from the bottom thereoffdepend ears 16,

vil() i. through the usual slot in thev end between .which is pivoted. the lower end of a bell crank lever 16a. The bell crank lever 16, is fulcrumed on a casting depending from the frame 1, as indicated at 17, and the' spaced apart standards 24. .The standards fit -in the vertical guides 14, on the horizontal bari. 12, of the frame 11, to properly guide the piston in lits vertical movement during` the operation o f the loom.

- 26, indicates a picker shoe, the inner end vof the same being pivoted between the upper spaced ends ci' the standards 24,v while its lower curved surface rocks in the guideway 13a. Extending from the shoe 26, is a picker 'stick 27, the upp'er end being projected of the lay, and it carries a picker 23i A settingflever 30, is pivotally mounted in a' slot in the vertical member A1 1zlof the swinging frame 11, and its inner' end is formed with y.a'lslot 31, through which 'projects ay pin 32, mounted inthe standards 24. The outer end of the setting lever 30, is bi furcated, and is pivoted at 33X to a link 33, which is normally drawn toward Athe frame 11, by a spring 34. The lower end of the link 33, is pivoted at 35 to the lower end' of' a bell crank tripping leverr34 T he tripI ping lever 34%is pivoted on'a pin 36, sup-- ported in ears 37, which project outwardly from the vertical members ofthe swinging -frame 1'1. The'. inner end- '374' of the bell I crank lever 341l projects-through a'slot in 'the vertical b'ar 11l of the frame 11,`and adjacent the-cy'linder 15.- On-the side of the cylinder 1 5', and arranged in the path of movement-of the end 37a, of the bell crank t. lever 34, is a tripping dog 39, designed to release the piston -tocause thev restoration:

of atmospheric pressure consequent upon the partial vacuum between the cylinder and piston to operate the picker stick, to throw the shuttle. This dog is formed .wit-ha slot l to receive bolts 39?, to permit of adjustment.

It will, of course, bev understood that the ymechanism described is duplicated on the' opposite side of the loom, tol'throwthe shutl tle in the reverse direction in lthe usual man# ner.

r1 hat is, tl1e 'lay is in its normal position to permit the operator toplace the threads and adjust the harness, etc. It may at this time be stated thatthe crank shaft is geared to the counter shaft, so that the-latter will be rotated once, 'while the crank shaft is making two revolutions', so as'pto. form a vacuum at each end of the loom in one complete reciprocation of the lay.- As the counter-shaftrotates, the crank. pin 20, will rock the crankv lever 16 (viewing-F ig. 1) and draw the cyl inder 15, down, the piston being heldin locked relation to the frame 11, by the trip-.

In operatioIn-let it' be assumed that. the vparts are in the position shown in Fig; -1.

ping lever 34, as `hereinafter spe irc'ally described. During the time the cyl'nder is being drawn down, the lay is rocked toward the front of the frame 1, and halfway back again toward its normal position, the crank 2 at this time; beingat the top c'enter. But,

before the cylinder 15, reaches the limit. of

its'downward movement, thedog 39, will contact 'with the end 37 of the bell crank lever34, and rock it on its pivot, and thereby throw its lowerfend -out. Immediately the pivot pin 35, passes. the vertical plane of the pivots 36 and 33", the vacuum created by the moving, cylinder will suddenly draw the piston downv into said cylinder and operate the 'picker stick, by the restoration'o-f atmospheric pressure. As the picker shoe is pivoted to' the standards 24, the picker will quickly throw the shuttle from the left hand boX7, and across vthe lay. It is to be borne in mind that) the, cylinder tripped the setting ef'ore the former completed its mechanism stroke', consequently the vacuumis not'mayin- Stained for a period after the parts are operated, which effectually avoids liability of leakage and lossof power 4when theshuttle j is thrown.

Near the bottom ofthe cylinder is afvalve' v40,whichin the instanceshown, comprises a' vthreaded ]olug'40"-,4 formed with an eccentrically .disposed vent opening 41,over which a flap valve operates.A 4This valve is arv ranged some distance above the bottom ofthe cylinder and is rendered adjustable so as to cont-rol the cushioning effect ofthe piston.

I'n'-l thefdownward stroke of. the pistfon byA --th'e forceof'the vacuum, it is cushioned be- Y.

low the opening 41, thereby preventing undue jar and liability lof breakage.

ofthe cylinder to obtain the proper. cushionin effect. Y 1

pon

during the'next succeeding forward movement, of the lay, the crank leverlG, is op erating to elevate both the piston and cylin- .1.251 the completion of the rearward movement to-normal position, and infact' 12511' By turning the plug, the opening 41, lmay be posi' '.tioned closer 'to or farther from the bottom A der to normal or set position. That is to say, the lower end of lever 16a, raises the cylinder and piston together until they reach the position shown in Fig. 1. In the upward movement the pin 32, rocks the lever 30, and the latter in turn depresses the link 33, and swings theouter member of the bell crank lever 3l, down until the pivot 35, passes the plane of thepivots 36 and 33X, at which time the spring 34, will draw the link,

, and consequentlyY the bell crank lever 34a intodlocked position, which will set, or in other words', lock, the piston to the frame 1l, invit-s elevated position for't'he-next operation: It is to be understood that during the foregoing operation, the setting and operating mechanism on `the opposite side of the loo.n is performing exactly the same movements, but at a different period in the cycle, so that upon each return stroke of the lay, one or the otherof Athe picker sticks will be. operated to 'throws the shuttle across the lay.` l

The pivotal center ofthe swinging frame 1l, is substantially the same as that of the swords, but to provide for any slight differences, the pivotal connection may be in the form of a ball and socket joint, as shown at 11X, in Fig. 7.y V

By constructing' and arranging the parts as described, I great-ly'increase the speed of the shuttle, and am enabled to practically double its reciprocal movements across the lay with substantially thesame power. This increase of'reciprocations of the shuttle is of inestimable value, as a greater percentage of weaving can be accomplished in a given 'time over what has been obtained hereto- 'fore By placing` the `cylinder and piston to operate vertically. and in the manner set forth, the necessity of holding the vacuum'before 4exerting effective force to throw the shuttle is done away with. Furthermore, it enables me to greatly increase the leverage, so

that the blow imparted to the shuttle is more efectivepand is instantaneous.

One of the most important results which iiow from this invention, in addition to th'e rapidity'with which the shuttle is thrown, resides in the fact that whenever the loom is stopped, the weight of the parts, and the partial vvacuum willfalways restore the lay to its normal or rear position. Under these conditions the operator can with great convenience adjust or repair the threads, and at. the same time thinvplaces or bulges in the fabric will be avoided. In looms .nowl in use, when the mechanism is stopped/the power necessary to voperate the picker sticks decreases and many times the shuttle -is thrown only part way across the lay, and as the latter is still incwi-ng, great damage is donc `to the cloth. .'This difficulty is successi` fully overcome in my present improvement,

for ifthe loom be stopped just at the time the trip is released the force of the vacuum will throw the shuttle entirely across the lay, with the same force as when'the mechanism vis running at full speed. If, when the loom' is stopped, and the cylinder has moved far enough to create a vacuum', but the'trip has not been reached, obviously the shuttle will remain in its box, while the la'y will gradually assume its normal position as previously stated. f

In Fig. 6, I have shown a somewhat dif` ferent embodiment of my improvement. 'Accordingl to this construction a single cylinder and piston arrangement is employed ends of the standards 24, are pivoted two 4bell, crank levers {t2-A2, each pivoted to brackets extending from the frame 11V. -To the upper ends Vof the bell crank levers arev pivoted rods 43, 43,'which extend in opposite directions toward the endsof, and under the lay. At the outer ends of the rods 43, are secured armsv L4-144, carrying the pickers. The crank lever 16, in this case, isconnected directly t'o a crank on the crank shaftpQ, so that upon each stroke of the lay the cylinderl, is drawn down and both' pickers will, as a result, be operated. But as there is but one shuttle, and as it is 'at either one side or the other, it follows it will i be thrown across in the usual manner.

What I, claim is.:'I A

1. In a pick motion for looms, a shuttlethrowihg element, means for holding said element in set position for operation under atmospheric pressure including two vacuum forming elements, means for moving oneof said elements relativeA to the vother to create a vacuum, and means for subsequently releasing the other said element to permit the restoration of atmospheric pressure to operate the shuttle throwing element. r y

2. A pick motion for looms, a power I means therefor including a cylinder and a 1piston in said cylinder, mechanism actuated in the movement of the loom to operate the cylinder to form a vacuum therein acting against said piston, and means to release .the piston at a'predetermined time. i 3. A pick motion for looms, operating mechanism therefor, said mechanism' inluding a cylinder, a piston therein, means or holding the piston in set position,means ,for operating the cylinder to form a vacuum herein acting on the piston, and means, operated by the cylinder to automatically releasejthe piston setting means to cause the vacuum to operate the pick. 1 y l 4f. A pick motion for looms and an operating'mechanism.therefor including two cla ments", 'one fitting within the other, means for holding one of the elements in set posi- `tion, means for operating the second'pne of said elements to ycreate a vacuum, and means' carried by ,the said second `mentioned-.element for releasing the holding 'means dur- 'ing movement of the former, Wherebythe vacuum formed, will operatel the irst'mentioned element .and operate the shuttle. 5.'- Afpick motion for looms and operating mechanism therefor includinga piston and j cylinder, means for operating the piston and Y 'stroke of the. operating parts in forming said, vacuum.

cylinder to create a vacuum acting on the' piston, and automaticmeans for destroying the vacuum before" the completion of. the

6. In 'a loom, the` combination ofv power m'eans, a swinging lay operated by the'pwer. means, a picker, mechanismfor operating Ithe picker including a piston and cylinder pivoted to swing with the lay, means operated by the power means for operating the cylinder to form a vacuum between the cylinder .and piston, and automatic'- means operable by the cylinder to release ,the piston' to permit it to vbe operated by the vacuum,

' meansfor forming av vacuum for operating 'the shuttle throwing element-.and an automatic tripping device for releasing 'the vacuum into operationduring the period the vacuum is being formed.'

' .th'roviiin a cylin er in which the 4pisto-n operates,lv

8. Ina loom,' tl1e combination of power means,'a y1ay,'shuttle throwing means, a vertically 4disposed piston pivoted to the shuttle means, and movable with the-lay,

:me-ans 'between thev power means and the cylinder to operate the? same to create a V4vacuum, `a setting device for locking the the piston before piston in one lposition, and means operated by the movement of the cylinder to releasef the movement of the cylin" der 4 ceases 9. In a loom, the combination .of ower means including a crank,'aA lay, a pic er, va

lowering the cylinder to create a vacuum,"

piston, connectionsbetween the piston and picker, a cylinder in which the piston operates, .a leveiI between the crank andthe. cylindervM-.to elevate the .cylinder and piston, l lmeans .for locking lthe pistonIA in velevated;l

position, thekcrank` and lever subsequentlyV and means operated before the cylindercompletes its movement `for-operating-the set ltingv mechanism to release the piston tocause the' vacuum vto operate the picker. v 10.In a pick motion'for'looms, a cylinder, a piston operating in the cylinder, a picker connectedwith thejpistom-means for'moving the piston and cylinder Atogether inone movement and, subsequently operating the -cylinder alone in the reverse movement to create a vacuumbetween said cylinder and 'said piston, mechanism operated", by .one` movement 'of the. piston for holding the same in the position itu was moved to by the cylindenand a device carriedby the cylinder for releasing the holding mechanism be- 'fore the cylinder completes its' movement to.A

cause the vacuum-t0 operatethe pieken throwing element, means forl holding said element in set position for operatonunder said element for producing avac'uum, and

1l. In a pick motion for looms, a sh'uttle A .75 atmospheric pressure, means coactingwith meansfor. automatically releasing the said "I tion.

12.-' In a pick motion for otally connected thereto, a laterally swinging support onl ,which the pickerstick is mountedto rock', a cylinder carriedby said element during the vacuum forming opera- 1 Ase looms, the com-- bination with a picker stick, of a piston piv-y said cylinder, means for raising the piston fand cylinder, a 'setting lever carried by said supportand operatively connected to the piston, means whereby said setting lever ward movement of the cylinder` and piston, means for drawing'ithe cylinder down independently of the piston tocreate'sub-atniospheric pressure, and means for'autoing theldownward .movement of the cyli-n der, for the purpose specified.

13. In a pick motion for looms, the-coni.- binationv with a picke'r stick, o f a laterally 'swinging' frame therefor uponvwhich the picker stick is mounted to rock, 4a cylinder Amounted in and carried by the frame, a-bell crank pivotally' connected at one :end tothe frame, a main frameon which said lbell A i05- crank isffulcrumed, a countershaft having av crank pin and slot connected With'one arm 4of said bell crank, a piston operable in. the

cylinder andl pivotally connected ,to the .picker stick, a setting lever fulcrumed in the frame-and'operatively connected to the' piston, meansl tendingv to lock said setting lever in one direction to hold thepist'on in ,az relatively raised position, a bell crank'- fulcrumed in the frame and operatively connected to the vsetting lever, and a tripping dog carried by the cylinderv and adapted to engage the Vlast bell crank, fgr theV purpose specified. l

14. Ina pik mot1on'forlooms, the combination with'a frame, a lay mounted in said izo frame, a .rocker "shaft, a laterally swinging frame journaled' on Athe rocker'shaft and operativelyconnected with the lay to swing therewith, a cylinder mounted in thesecond i named fr a'ine, av bell .crank fulcriimedn l the first-,named frame and having one of its 'arms pivotally connected to the lower end ofthe. cylinder, a countershaft having a .crank and slot connection Awith the .other S5' support, the piston being operable within will be rocked in one position upon the up- 95 matically unlocking the setting lever dur'- ally swinging frame, a piston mounted armoffsaid bellv crank, a pistonoperable within the cylinder and pivotally connected to the picker stick, a setting lever fulcrumed in the second named `frame and having one ot its arms operatively connected to said piston, a bell Vcrank lfulcrumv in the second named frame andaoperatively connected to one arm of the setting lever, a contractile spring operatively connected to the setting lever and tending to draw the same ina direction tohold the' piston atl the upperl limit of its `x'novement,.andatripping dog `carried 'by the cylinder and movable against the second named bell the lay, a picker stick,.a .laterally swinging frame on which the picker stick is mounted lto rock, a connection between said frame and thesword, a bell crank lever fulcrumed on the nain frame, a cylinder mounted in the laterally swinging frame and' operatively connected to one arm of said -bell lcrank, a countershaft having a-crank' pin 'and slot connection with the other arm of said bell crank,"whereby the rotationpf said shaft will l cause thecylinder to move up,- wardly 'and' downwardly in the Ilaterto. move in the cylinder, and having a pivotal connection with' the `picker stick, a setting lever fulcrumed intermediate of its ends in the laterally swinging frame andoperati-vdy connected at oneend to the' piston, a bell crankfulcr med in the laterall-y swinging frame, a nk pivotally connecting the other end of the setting lever to one arm of the secondlnamed bell crank, a spring tending to draw said link inwardly. for the purpose specified, and a tripping dog carried by the cylinder and adapted .to -en gage the second named bell crank 'upon the downward movement of the cylinder, whereby to throw tbe setting lever to its inoperative-position. 1 y

' 16. In a pick motion for looms, the combination with a main frame-work, of a lay mounted therein, a picker stick, a countershaft, a bell crank fulcrumed on thev main frame-work and having a crank pin and slot connection with the countershaft, a'laterally swinging frame on which the picker crank, for-"the pur- ,stickyis mounted to rock, a sword connected .to the lay, a connection between the laterally swinging frame and `said sword, a cylinder movable in said frame and pivotally yconnected .atits lower end to one arm-of said bell crank, a'piston movablein said cylinder .and pivotally connected to the picker stick, asetting leverulcrumed intermediate of its ends in the laterally swingfing `frame, one arm of said setting lever having a slot and pin connection with the piston, a bell crank fulcrumed in the laterally swinging frame, a link operatively connecting one arm of-said second named bell crank to the outer arm of the setting lever, thev other arm of said second named bell crank projecting into the frame toward the cylinder, and a'tripping dog carried by thecylinder and adapted to. engage the'last named arm of the second named bell crank,

as and for the purpose set forth.

17. In a loom, the combination of power means, a swinging lay operated by the-power means, shuttle operating mechanism. inc-luding two elements, one fitting within theother and pivoted to swing-'with the lay, `means operated by the' power means for operating the shuttle operating mechanism to form a `vacuum between the two elements, automatic means for destroying thevacuum to throw a shuttle, the two elements being norr .lly one within the other when the lay is ai, back center.

6. In a loom, the combination of power means, a swinging la'y operated by the power means, shuttle operating mechanism including two elements, one fitting within the yother 'and' pivotedto swing with the lay, means operated by the power means for operating one of the elements to form a vacuum between the two elements, and automatic means operable by'one element to releasethe other element topermit the latter 'to be operated by the vacuum to throw a p shuttle, the two elements being normally one within the other when the lay 1s at back center.

In testimonywhereof'I have signed my Tnameto this specification in the presence of two subscribing witnesses.

f JOHN E. YARBROUGH.' lVitnesses:

S. C. JOHNSON, JNO. IMnnE.

Copies of this patent may be obtained lfor five cents each, by addressing the Cpmmissioner of Patents,

' Washington, D. C. 

